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Therapeutic ultrasound is a commonly used modality for treating knee cap pain in clinical practice. However, evidence indicate that ultrasound therapy was not shown to have a clinically important effect on pain relief for people with knee cap pain.
Platelet-rich-plasma (PRP) is the cellular component of the plasma with a higher percentage of platelets compared to total blood. Since it contains a number of growth factors, PRP injections in sports injury treatments became common today. However, there is no good evidence that PRP could be beneficial for people with knee cap pain.